The industry transition to 10 Gigabit Ethernet (10GbE) has enabled network unification and consolidation, as well as robust support for virtualized usage models. At the same time, however, combining traffic that has been traditionally separated on multiple physical networks and server adapters creates new quality of service (QoS) considerations. This paper examines best practices for analyzing, monitoring and controlling bandwidth in VMware vSphere 4.1 environments when using Dell servers and Intel Ethernet 10 Gigabit server adapters.